Скачать или смотреть Stormwater Compliance and Monitoring on a Floating Bridge

Municon 2021: Day 2, Track 1

Paul Fendt & Gordon MacDonald, Parametrix

The SR520 bridge across Lake Washington was replaced with a new floating bridge in April 2016. Treating
stormwater from the new bridge required innovative analyses. The AKART approach approved by Ecology
is a three-component treatment train that includes high-efficiency sweeping.
WSDOT embarked on a three-year monitoring program and collected data to determine stormwater-discharge
concentrations. The findings and learning objectives of the monitoring program include: 1) conditions that
result in the highest and lowest runoff concentrations; 2) demonstrating the use of AKART for selecting BMPs
in unique settings; 3) using mixing zones for stormwater discharges; 4) high-efficiency sweeping performance
on high-volume highways; and 5) achieving discharge compliance.